One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(17,18,23,27)(19,28,29,39)(20,25,32,40)(21,26,22,36)(24,34,37,31)(30,43,44,48)(33,41,35,42)(38,45,47,46)(2,5)(6,8)(9,10)(11,15)(12,14)(13,16)(19,29)(20,32)(24,37)(25,40)(28,39)(31,34)(33,35)(41,42) involution — undirected(9,11)(10,13)(12,16)(14,15)(17,19,21,34,23,29,22,31)(18,24,36,39,27,37,26,28)(20,30,35,45,32,44,33,46)(25,38,41,48,40,47,42,43)(1,3,4,7)(2,6,5,8)(11,16)(13,15)(17,20,23,32)(18,25,27,40)(19,30,29,44)(21,35,22,33)(24,38,37,47)(26,42,36,41)(28,43,39,48)(31,46,34,45)(10,14)(13,15)(17,21,23,22)(18,26,27,36)(19,31,29,34)(20,33,32,35)(24,39,37,28)(25,41,40,42)(30,45,44,46)(38,43,47,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.